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The generator of AM EMFs consists of a battery-driven radiofrequency (RF) EMF generator connected to a 1.5 m long 50 ? coaxial cable, to the other end of which a stainless-steel spoon-shaped mouthpiece is connected via an impedance transformer. The RF source of the device corresponds to a class C amplifier operating at 27.12 MHz. The carrier frequency is AM with a modulation depth of 85±5%, whereas the modulation frequency is generated by a digital direct synthesiser with a resolution of 10-7. The treatment sequence is controlled by a microcontroller (Atmel AT89S8252, Fribourg, Switzerland), that is, duration of session, sequence of modulation frequencies and duration of each sequence can be programmed via PC over a RS232 interface. The RF output is adjusted to 100 mW into a 50 ? load, which results in an emitting power identical to that of the device used for the treatment of insomnia.
write a project on electrical electronices
What are ultrasonic sensors made of? What is a good online source to find information on a basic level about ultrasonic sensors?
Voltage divider bias: The voltage divider is made by using external resistors R 1 and R 2 . The voltage beyond than R 2 forward biases the emitter junction. Via prop
Bureau of Energy Efficiency Setting up of the Bureau of Energy Efficiency The Bureau of Energy Efficiency has been established with effect from 1st March, 2002 under the
Q. Explain working of Ammeter? In order to measure the current through a wire or line of a circuit, an ammeter is connected in series with the line. A practical ammeter can usu
transfer function of Lube Oil Cooler Temperature
What is the main thing to look for in calculations of air gaps?
1. Suppose the California government sets aside a square patch of land that is 10 kilometers on each side and plans to use this land to generate electrical power with wind turbines
FIG. 2 Car Park Simulation Consider the above diagram, FIGURE 2, of the car park. The object of this assignment is to write a program to operate the barriers to allow the cars in
Q. A transmitter is connected to an antenna by a transmission line for which ¯ Z 0 = R 0 = 5 0 . The transmitter source impedance is matched to the line, but the antenna is kno
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